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Friction of molybdenum disulfide每titanium films under cryogenic vacuum conditions

Datetime:2016/7/6 22:05:58hit:10500

Friction of molybdenum disulfide每titanium films under cryogenic vacuum conditions. The tribological behavior of steel and sapphire sliding on a sputtered MoS 2 +Ti coating was studied in ultra-high vacuum as a function of temperature over the range of 4每300K. The coefficient of kinetic friction for the steel/moly interface was determined to be approximately 0.05 from room temperature to 240K, and increased monotonically to 0.125 at 4K. The sapphire/moly friction coefficient was measured to be 0.15㊣0.05 at room temperature and increased monotonically to 0.25 at 4K. We also analyze in detail the flash temperature due to frictional heating at the sliding contacts. Flash heating is a particularly strong effect at cryogenic  temperatures